Hypodermic syringe



April 16, 1929. F, w. sTEUE 1,709,637

HYPODERMI C SYRINGE Filed March 25. 1925 f B23? 2%@ ik 5&1@

Patented Apr. 16, 1929. f

UNITED STATES PATENT OFFICE.

FRED W. STEUER,A OF BOSTON, MASSACHUSETTS, ASSIGNOR T COOK LABORATORIES; INC., A CORPORATION 0F DELAWARE.

HYPODERMIC SYRINGE.

application met; March 25, t1925. serial No. 18,099.

This invention relates to hypodermic syringes of the type employing medicament-dispensing cartridges or containers, and among other objects aims to provide an improved construction of syringe adapted to be opened laterally for lateral insertion of the cartridge.

The invention may be understood by refer-v ence to one illustrative embodiment shown in the accompanying drawings, in which:

Fig. 1 is -a side elevation of the syringe shown ready for use;

Fig. 2 is an enlarged elevation of the principal parts of the syringe shown open for loading; l f

Fig. 3 is an end elevation of the syringe as shown in Fig. 2.

Fig. 4 is an enlarged longitudinal sectional view showing the medicament cartridge in position.

Fig. 5 is a section on line 5-5 of Fig. '4.

It is to be understood that the illustrative embodiment shown in the drawings is simply a preferred form of the invention; and that in the following explanation of that specific form, the described details of structure and organization are merely exemplary.

The syringe barrel comprises two complementary barrel sections 6, 7, each of which is shown as semi-cylindrical, hinged together longitudinally as at 8 to permit opening thereof for loading the syringe with a medicament cartridge. The cartridge shown consists of a glass tube 9 sealed at opposite ends by a readily pierceableplug 10 and a slidable plug 11, the latter designed to be pushed by the plunger rod 12 of the syringe to dispensethe medicament through the syr- 'inge needle 13; said cartridge exemplifying a medicament package whose interior volume is contractible.

In the specific syringe shown, either barrel section may provide an open tray for reception of the cartridge, as will be understood from Fig. 2; however, as a matter of conven- '45 ience, the cartridge will be laid most frequently in barrel section 6, which carries the plunger rod. After the cartridge is in place, the barrel section 7, which then serves as a lid, is closed, and the two sections are held together by a sleeve lock 14 at the plunger end of the instrument, thus securing the cartridge. The sleeve lock 14 is shown swiveled on a barrel head 15 which is movable longitudinally by means of a hollow screw 16 secured thereto and projecting therefroml and threaded within a ring 17 secured to the end 0f the barrel section 6. A knurled bead18 on barrel head 15 facilitates rotation of said head to work the screw and thereby advance or retract the sleeve lock, which is constructed and arranged to enclose the ends of the barrel sections. Through the hollow screw the plunger rod 12 may slide. l,

At the forward end of screw 16 a flange 19 is formed for engagement with butt end of the cartridge (Fig. 4). The opposite end' of sbarrel section 6 has a stop or abutment 20 which serves to engage the front end of the cartridge so as to retain the cartridge until the barrel is closed. In using the syringe, it is desirable to force the cartridge in the direction of the needle, not only to complete the piercing of its end plug 10 by means of the needle, but also to prevent objectionable looseness of fit of a sub-standard cartridge,

and to press the resilient end plug 10 against the head 21 provided on barrel section 7 to insure a tight seal at that end of thecartridge. Obviously, the syringe may hold cartridges of various sizes. The needlecarrying head 21 is slotted as at 22 to receive` abutment 20 when the syringe is closed. However, as will be understood from Fig. 3,

the abutment does not interfere with the insertion ofthe needle into the pierceable end plug 10, which may be done after the car.-

tridge is inserted in the syringe.

stricted to the particular embodiment thereof herein shown and described. Moreover, it.90

is not indispensable that all the features of theinvention be used conjointly, since they may be employed advantageously in various combinations and sub-combinations as defined in the claims.

What is claimed is z 1. A hypodermic syringe comprising,1n combination, a barrel; said barrel comprising longitudinally `hinged sections to permit lateral opening for convenient insertion 100 sleeve and screw-threaded on one ofthe barrel sections to move said sleeve longitudinally.

3. A hypodermic syringe comprising, yin combination, a longitudinally hinged barrel providing two relatively movable barrel sections; one of said barrel sections having an abutment for a cartridge of medicament; means for locking the barrel sections together; a plunger; and means constructed and arranged to force the cartridge against said abutment, before operation.

4. A hypodermicy syringe comprising,

in combination, a sectional longitudinallyA hinged barrel, the sections whereof are hollow to lit about a cartridge of medicament; a syringe head carried on one of said barrel sections at the end thereof and movable longitudinally of said section by means of screwthreads; and a hollow sleeve swiveled on the syringe head at one end thereof and constructed and arranged to be moved over the adjacent ends of the juxtaposed barrel sections when the syringe head is rotated in one direction, thereby to locli the barrel sections in cartridge-enclosing position.

5. A hypodermic syringe comprising, in combination, a sectional longitudinally hinged barrel, the sections whereof are hollow to lit about a cartridge of medicament; one of said sections having a syringe head at one end thereof, and means projecting from the syringe head upon Which a double-pointed hypodermic needle may be secured; another of said barrel sections-having an abutment at the corresponding end against which the cartridge may be thrust; said syringe head having a lateral slot to receive said abutment Whose form and dimensions are such that inward thrusting of the needle to pierce the end of the cartridge is not inter ered with when the sections are brought together; means carried by the barrel section having the abutment'constructed and arranged to engage the cartridge to thrust it against the abutment and hold it on said barrel section;

and means to lock the barrel sections together l in cartridge-enclosing position.

6. An instrument of the class described comprising, in combination, a cartridgeholder comprising complemental longitudinally hinged sections, one of said sections er, said cartridge-holder comprising complemental longitudinally hinged sections.

8. In a cartridge syringe, a cartridgeholding and operatinginstrument having in itsbreech end a cartridge-operating plunger and having its fore end constructed to provide a cartridge abutment and to accommodate a cartridge-piercing cannula, said instrument embodying longitudinally-hinged complemental cartridge-enclosing sections and a longitudinally movable locking sleeve l said abutment before operation of the plungl adapted to cooperate With said sections to i lock the instrument in closed operative ,condition.

9. In a cartridge syringe, a cartridgeholding and operating instrument having in its breech end a cartridge-operating plunger and having its fore end constructed to provide a cartridge abutment and to accommodate a cartridge-'piercing cannula, said in` strument embodying longitudinally-hinged complemental cartridge-enclosing sections and having axially adjustable means to force the cartridge against said abutment and to lock the instrument in closed operative condition.

10. In a cartridge syringe, a cartridgeholding and operating instrument having in its breech end a cartridge-operating plunger and having its fore end constructed to provide a cartridge abutment and to accommodate a cartridge-piercing cannula, said instrument embodying longitudinally-hinged complementgil cartridge-enclosing sections and having 1n its breech end an axially movable member in which the plunger is mounted, adapted to lock the instrument in f'closed operative condition.

11. In a cartridge syringe, a cartridgeholding and operating instrument having ien its breech end a cartridge-operating plunger and having its fore end constructed to provide a cartridge abutment and to accommodate a cartridge-piercing cannula, said 1nstrument embodying longitudinally-hinged complemental cartridge-enclosing sectlons and having in its breech end screw actuated means to force the cartridge against said,`Y

operative condition.

12'. In a cartridge syringe, a lcart-ridgeholding and operating instrument having in its breech end a cartrldge-operating plunger abutment and to lock the instrument in closed and having its fore end constructed to proend of the cartridge to force it against said vide a cartridge abutment and to accommoabutment, and means associated with said date a cartridge-piercing cannula, said inscrew to lock the instrument in closed opera- 10 strulnent embodying longitudinally-hinged tive condition.

complemental sections, a screw in which the In testimony whereof, I have signed my plunger is mounted connected with one of nume to this specification.

said sections and adapted to bear on the butt FRED W. STEUER. 

